Inventor
Walter Ka Wai Chu
Inventor
Shanghai, CN
Overview
Patents· 9 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H04Rprimary
H04RLoudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers43%
G11CStatic stores21%
H03FAmplifiers14%
C03CChemical composition of glasses, glazes or vitreous enamels7%
G10KSound-producing devices7%
H03KPulse technique7%
PatentTitleYear
10,998,010Systems for discharging leakage current over a range of process, voltage, temperature (PVT) conditions202110,897,244Apparatuses and methods for voltage dependent delay202110,885,998Differential fuse-readout circuit for electronic devices202110,735,841Dual-mode acoustic radiator speaker system202010,652,639Dual-mode acoustic radiator speaker system202010,468,012Homogeneous hard speaker radiating diaphragms with damping20199,288,561'Speaker device'20168,699,720'Headphones with distortion-free loudness limiting and dynamic equalization device'20148,447,063'Flat thin dynamic speaker'2013Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2013–2020Patents assigned to CHU WALTER KA WAI (4)· patent assignee history
2013–2014Based in Tai Wai, HK· patent location history
2016Patents assigned to FORTUNE GRAND TECHNOLOGY INC (1)· patent assignee history
2019Patents assigned to BDNC HOLDING LTD (1)· patent assignee history
2019Based in Hong Kong, CN· patent location history
2020Patents assigned to FAIF Designs Ltd (2)· patent assignee history
2020Based in Shatin, HK· patent location history
2021Patents assigned to MICRON TECHNOLOGY INC (3)· patent assignee history
2021Based in Shanghai, CN· patent location history
2021Based in Xuhui District, CN· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| CHU WALTER KA WAIself | 4 | 2013–2020 |
| MICRON TECHNOLOGY INC | 3 | 2021 |
| FAIF Designs Ltd | 2 | 2020 |
| BDNC HOLDING LTD | 1 | 2019 |
| FORTUNE GRAND TECHNOLOGY INC | 1 | 2016 |
Locations
| Location | Patents | Span |
|---|---|---|
| Shanghai, CN | 2 | 2021 |
| Shatin, HK | 2 | 2020 |
| Tai Wai, HK | 2 | 2013–2014 |
| Xuhui District, CN | 1 | 2021 |
| Hong Kong, CN | 1 | 2019 |